Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...243..553v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 243, no. 2, March 1991, p. 553-558.
Astronomy and Astrophysics
Astronomy
15
Double Stars, Magnetohydrodynamic Turbulence, Seeing (Astronomy), Speckle Interferometry, Temporal Distribution, Angular Resolution, Cross Correlation, Earth Atmosphere, Wind Measurement
Scientific paper
Investigations of the lifetime of speckle interferograms and of the space invariance of isoplanicity of speckle interferograms are useful for optimizing high angular resolution imaging and for testing and future astronomical observatory sites. The calculated values of speckle lifetime and isoplanatic angle are compared with direct correlation measurements. Good agreement is found for the isoplanatic angle theta. For the speckle lifetime, only partial agreement is found, i.e., very good for one night, rather good for two nights, and very bad for the last night. A possible explanation for the disagreement is presented.
Caccia Jean-Luc
Mueller Marcus
Vernin Jean
Weigelt Gerd
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